Alert archive / Alabama / Heat Advisories in 2018

Heat Advisory 9, NWS Birmingham, AL

July 19, 201819 counties in Alabama

NWS Birmingham, AL issued this heat advisory at Jul 19, 2018, 4:27 PM CDT for 19 counties in Alabama. It took effect at Jul 20, 2018, 12:00 PM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Jul 19, 2018, 4:27 PM CDT (21:27 UTC)
In effect from
Jul 20, 2018, 12:00 PM CDT
Expired
Jul 20, 2018, 7:00 PM CDT
In force
7 hr
Issued by
NWS Birmingham, AL

Counties Autauga County, AL, Bibb County, AL, Chilton County, AL, Dallas County, AL, Elmore County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Lamar County, AL, Lowndes County, AL, Marengo County, AL, Marion County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 57 km from the middle of the area, began a volume at 21:27 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.5 hours before the alert went out and 267 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 2018-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 915 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2018-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
915 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
807 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 18, 11:50 PM CDTAreal Flood AdvisoryBMXPickens115 min
Jul 19, 6:41 AM CDTAreal Flood AdvisoryBMXPickens3 hr
Jul 19, 7:43 AM CDTSpecial Weather StatementBMXMarion32 min
Jul 19, 8:09 AM CDTSpecial Weather StatementBMXLamar, Marion36 min
Jul 19, 8:12 AM CDTAreal Flood AdvisoryBMXLamar, Marion3 hr
Jul 19, 8:42 AM CDTSpecial Weather StatementBMXFayette, Lamar33 min
Jul 19, 9:14 AM CDTSpecial Weather StatementBMXFayette31 min
Jul 19, 9:59 AM CDTAreal Flood AdvisoryBMXPickens3 hr
Jul 19, 1:02 PM CDTSpecial Weather StatementBMXAutauga28 min
Jul 19, 1:09 PM CDTSpecial Weather StatementBMXTallapoosa36 min
Jul 19, 2:05 PM CDTSpecial Weather StatementBMXMacon25 min
Jul 19, 3:09 PM CDTSpecial Weather StatementBMXRandolph36 min
Jul 19, 3:22 PM CDTSpecial Weather StatementBMXCoosa38 min
Jul 19, 3:36 PM CDTSpecial Weather StatementBMXRandolph24 min
Jul 19, 4:28 PM CDTSpecial Weather StatementBMXCalhoun32 min
Jul 19, 4:47 PM CDTSpecial Weather StatementBMXEtowah28 min
Jul 19, 5:40 PM CDTSpecial Weather StatementBMXTalladega35 min

Nearby

Heat Advisories in Alabama, 2018Every heat advisory in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.